CVE-2025-34237: Advantech WebAccess/VPN < 1.1.5 Stored XSS via StandaloneVpnClientsController.addStandaloneVpnClientAction()
Advantech WebAccess/VPN versions prior to 1.1.5 contain a stored cross-site scripting (XSS) vulnerability via StandaloneVpnClientsController.addStandaloneVpnClientAction(). Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Advantech WebAccess/VPNto a version that resolves this vulnerability.Fixed in 1.1.5
Event History
Frequently Asked Questions
What is the severity of CVE-2025-34237?
The severity of CVE-2025-34237 is classified as high due to its potential for stored cross-site scripting (XSS) attacks.
How do I fix CVE-2025-34237?
To fix CVE-2025-34237, update Advantech WebAccess/VPN to version 1.1.5 or later, which includes patches for this vulnerability.
What type of vulnerability is CVE-2025-34237?
CVE-2025-34237 is a stored cross-site scripting (XSS) vulnerability that allows an attacker to execute arbitrary scripts in the context of a user's session.
Which versions of Advantech WebAccess/VPN are affected by CVE-2025-34237?
Advantech WebAccess/VPN versions prior to 1.1.5 are affected by CVE-2025-34237.
What can attackers do with CVE-2025-34237?
Attackers can exploit CVE-2025-34237 to inject malicious scripts, potentially leading to data theft, unauthorized actions, or impactful changes within a user’s session.